In 2021, Artea Corporation began manufacturing a product with a selling price of $78 per unit. During 2021 and 2022 the following costs were incurred: Manufacturing costs: Variable manufacturing cost per unit produced: Direct materials Direct labor Variable manufacturing overhead $13 $6 $5 $121,000 Fixed manufacturing overhead per year Selling and administrative expenses: Variable selling and administrative expense per unit sold $5 Fixed selling and administrative expense per year $ 72,000 2021 2022 Units produced during the year 8,000 7,000 Units sold during the year 7,000 5,000 Units in ending inventory 1,000 3,000 Required: a. Assume the company uses absorption costing. Compute the unit product cost in each year. b. Assume the company uses variable costing. Compute the unit product cost in each year. c. Assume the company uses absorption costing. Prepare an income statement for each year. d. Assume the company uses variable costing. Prepare an income statement for each year.